Apparatus for generating motive fluid.



V I E. e. HATCH.

APPARATUS FOR GENERATING MOTIVE FLUID.

APPLICATION FILED JAN.16, 1912.

Patented'JaIL 7, 1913.

3 SHEETS-SHEET 1.

' Manon @234 ATTORNEY APPLICATION FILED JAN. 16, 1912.

Patented Jan. 7; 1913.

3 SHEETS-SHEET 2.

' l/V E/VTOR WIT/V 8 8 E. G. HATCH. APPARATUS FOR GENERATING MOTI VB I-L-UID.

APPLICATION FILED JAN. 16, 1912. v PatentedJan. 7, 1913.

3 SHEETS-SHEET a.

WITN 8 8 Erwin 6. names, or m YORK, N. Y.

APPARATUS FOR GENERATING MO'IIV E FLUID.

, Specification of Letters Patent.

Application filed January 16, 1912. Serial at. 071,451.

To all whom, it may concern Be it known that I, EDWIN G. HATCH, a

citizen of the United States, and a resident of the borough of Brooklyn, county of Kings, city and State of New York, have invented certain new and useful Improvements 1n Apparatus for Generating Motive Fluld, of which the following is a specification, accompanied by drawings.

This invention relates to apparatus for generating gaseous or vaporous motive, fluid for primemovers, particularly of the piston or turbine type, which depend for their operation upon the pressure, or on the velocity, or in part on both the pressure and velocity of the motive fluid .supplied.

The objects of the invention are to obtain increased efliciency and economy of operation in both the motive fluid generating apparatus and in the prime mover, by utilizing as much as possible of the heat ordinarily lost in the disposition of the products of combustion, and in the water jackets.

In accordance with this invention, either simple or explosive combustion of charges of a gaseous or vaporous fuel mixture is caused to take place in a suitable closed and jacketed combustion chamber having supply arid exhaust ports, but'without movable interior working parts, such as a piston, so that practically all the heat of combustion or explosion is available for heating the chamber Walls and generating steam in the water passages. By jacket is meant all the passages forming a part ofthe combustion chamber, through which the water and steam circulate. The products of combustion are then mixed with the steam so generated, preferably after the products have left the combustion chamber and if desired,

a diluent, as air, may be added to the mixture. This motive fluid comprising products of combustion, steam and preferably a diluent are supplied to the prime mover at temperatures and pressures best suited for the operation of the' particular type of prime mover used.

In apparatus of the improved character described, in which the combustion chamber is not itself a mechanical motor, but a true generator means should preferably be provided independent of the operation of the combustion chamber and supplying fuel mixture to the combustion chamber to start the devised further improvements in mv apparatus, for increasing the saving of heat, as will hereinafter appear. i

To all of these ends the invention consists of the apparatus shown in its preferred embodiments in the accompanying drawings, in'which- Figure 1 is a diagrammatic top plan view partly horizontal section, illustrating the apparatus for carrying out the invention; Fig. 2 isan enlarged detail transverse sectional view of the combustion chamber on the line 22 of Fig. 1, looking in the direction of the arrows. Fig. 3 is an enlarged detail transverse sectional view of the fuel mixer on the line 3-3 of Fig. 1, looking in the direction of the arrows; Fig. 4 is an enlarged detail longitudinal sectional view of the motive fluid mixer on the line 4 4 of Fig. 1, looking in the direction of the arrows; Fig. 5 is a detail longitudinal sectional view on the line 55 of Fig. 1, looking in the direction of the arrows, and illustrating aportion of the valve operating device; Fig. 6 is a diagrammatic plan' view partly in horizontal section of a modification ofthe apparatus; Fig. 7 is an enlarged detail longitudinal sectional view on the line 77 of Fig. 1, looking in the direction of the arrows, showing a form of valve mechanism, and Fig. 8 is an enlarged detail view of the contact device on line 66 of Fig. 6.-

Referring to the drawings, A represents the working cylinder of a suitable prime mover, as a piston engine, towhich motive fluid is to be supplied through the pipe B leading. to the valve chest C of the engine. The combustion chamber is represented at D in Fig. 1 and shown in transverse section in- Fig. 2, illustrating a suitable form of water jacket which will hereinafter be described more particularly. The combustion chant ber proper is a compartment ,or space E without movable interior working parts and communicating through the exhaust aperture F and pipe G with a motivefluid mixer H shown in detail in Fig. 4. The water apparatus, and I have Patented Jan. 7,1913.

prime mover, for A jacket of the combustion chamber D also communicates by means of the pipe J with the mixer H, in which-the products of combustion from the combustion chamber and the steam from the water jacket are mixed and supplied through the pipe B to the working cylinder A. A diluent, as for instance, air, may also be admitted to the mixer H through the pipe K.

A fuel storage reservoir L is preferably connected by means of the pipe 0 to the supply port of the combustion chamber 1) and fuel mixture is supplied to the storage reservoir L under pressure, as b means of the compressor P of any suita le type, driven by a suitable motor or engine, as the engine cylinder Q. A fuel mixer R shown in detail in Fig. 3 communicates with the compressor P and means are provided for supplying a gaseous or vaporous fuel and a sup orter of combustion to said fuel mixer R. il may be supplied to the mixer R from an oil reservoir S which may be so elevated that oil will always flow into the mixer R, and air may be supplied to the fuel mixer R fromthe air reservoir T, or

atmospheric air may be drawn from the out let U. Water for the jackets of the engine A, combustion chamber D, and fuel storage reservoir L, may be supplied from a suitable water storage tank or pump V. Inlet and outlet valves W and X are provided in the pipes O and G respectively for the combustion chamber D by means of which the supply and exhaust to and from the combustion chamber are controlled and I prefer to provide automatic controllin mechanism for said valves, illustrated at capable of suitable adjustment and connected to be operated by any suitable moving part of the apparatus, as from the piston rod Z.

While any suitable form of water jacket may be provided for the combustion chamber D, I prefer the form shown in Fig. 2, in which the combustion chamber is provided with a dome a to which water is supplied through the pipe I). Within the outer shell of the combustion chamber is shown in this instance'a casing 0 having tortuous longitudinal connecting passages therethrough communicating at one end with the inlet apertures d and communicating at the other end with the outlet aperture e. .An annular space 7 is provided between the easing 0 and the shellof the combustion chamber, so that the acket water may flow freely through all the passages provided and be subjected throughout its course to the heat of combustion generated in the combustion chamber proper E within the casing a. The casing 0 as shown in Fig. 2, is also connected to the combustion chamber walls as by means of the hollow neck 9, communieating with the combustion chamber proper E as by means of the perforations h, by

means of which an initial charge or charges of fuel mixture may be supplied to the combustion chamber to start the apparatus in generation. Any suitable arrangement of tortuous passages for the jacket water and steam may be provided, not necessarily the construction shown.

Any suitable water jackets may be provided for the engine cylinder A and the storage reservoir L and as shown, the water supply V is connected by pipe 7' t0 the engine jacket and thence by pipe is to the fuel storage reservoir jacket which communicates by means of pipe 6 with the dome aof the combustion chamber. The outlet e of the combustion chamber jacket is connected by pipe J with the motive fluid mixer H. It is not necessary I to' use a jacketed fuel storage reservoir, but in. case this construction is provided, the jacket water may be first heated at the engine cylinder A and furtherheated in the jacket of the fuel storage reservoir. The heated water or possibly steam or perhaps a mixture of water and steam passes'through the pipe I) to the combustion chamber water jacket and steam emerges from the outlet e of the combustion chamber water jacket, through pipe J to the motive fluid mixer H where the products of combustion, steam and preferably air, are brought together and the final working fluid produced. Any suit able means may be provided for causing the water to circulate through the jacket system. A controlling valve 0 is preferably provided on the pipe 7' connecting with the water tank or pump V and a controlling valve p is provided on the steam pipe J.

controlling valve 9 is provided on the motive fluid supply pipe B connecting with the engine A, and pressure gages 'r and s are preferably provided on the pipes J and B respectively. The motive fluid mixer H is preferably so constructed that the velocity of the entering steam through the pipe J will aid in exhausting the products of combustion from the combustion chamber, and to this end I rovide concentric nozzles t and u in the mixer H converging to a contracted throat 'u. The interior steam nozzle 1 communicates with the steam pipe J, while the outer nozzle to communicates with the pipe G leading to the exhaust from the combustion chamber, so that a device on the injector principle is in effect provided. An air passage to surrounds the nozzle u and communicates with the air pipe K having the outlet to atmosphere at 1'- controlled by the valve y. The air pipe K also connects by means of the pipe 2 with the air reservoir T, so that air under pressure may be supplied to the motive fluid mixer H by manipulating the controlling valve 2 in the pipe 2. Obviously the products of combustion and steam may be exhausted to atmosphere through the outlet 02 if desired under certain circumstances.

The pump or compressor P is shown 1n this instance of the double-acting piston,

storage reservoir L and check valves 11 are preferably provided in the branches of the pipe 10,'as shown. A pressure gage 12 may also be provided in pipe 10. The fuel mixer It may be of any suitable type, but in this instance is preferably provided with the inner mixing chamber 13 and the outer jacket 14. The mixing chamber proper 13, is supplied with oil or other fuel from the oil reservoir S through the pipe 15, and with air or other supporter. of combustion from the air reservoir T through the pipe 2 and the pipe 16. Both the oil and air pipes 15 and 16 preferably pass for at least a portion of their length through the exhaust pipe 17 connecting with the exhaust of the working cylinder A, and also connecting through the branch pipe 18 with the exhaust of the cylinder Q, so that the oil and gas pipes 15 and 16 are heated by the exhaust products of the apparatus. Pipe 17 communicates with the jacket 14 of the fuel mixer R and from thence the exhaust products are exhausted through the pipe 19 to the atmosphere or possibly to a condenser. Exhaust pipe 17 from the engine A is provided with a controlling valve 20 and exhaust pipe 18 from the engine cylinder Q is provided with the controlling valve 21.v If desired, the exhaust from the cylinder Q may pass to atmosphere through the pipe 2 controlled by the valve 23, and the exhaust from engine A may pass to the atmosphere through the pipe 24 controlled by the valve 25. By closing the controlling valve 26 inthe air may be drawrijfro'm the afmispliis' through the. inlet cont-rolledsby'the valve 27. The oil reservoirSis'also preferablyj acketedand heated by the exhaust products,

which are led to and through the oil reservoir jacket bythe branch pipe 28. Suitable means are. provided for heating the fuel mixer R, in'this instance, burners 29 being shown beneath the mixer connected by a pipe 30 to a carbureter 3 1 which in turn is connected by pipe 32 to the oil reservoir S and I of the motive pipe 16 leading to.the flin reservgir f1,

controlled by the valve 33. An adjustable opening 34. may be provided in the bottom of the mixer R through which the burners may be ignited. Y a

Any suitable means maybe provided for operating the engine Q to actuate the ,compresor P, but in this instance -I prefer to operate'the engine Q by means of a portion fluid generated. As shown, a pipe 35 connects the motive fluid mixer H with the valve chest 36 of engine Q. and a branch pipe 37 connects the exhaust pipe 17 with the pipe 35. Cont-rolling valves 38 and 39 are provided for the pipes 35 and 37, so that the exhaust products may pass directly to pipe 17 by closing valve 38 and opening valve 39. w a

I have illustrated suitable means for automatically actuating'the supply and exhaust valvesW andX for the combustion chamber, and this apparatus designated at Y is capable of such adjustment, that thegeneration of motive fluid may be controlled in accordance with the load on the working cylinder. A main shaft 40 is revolubly supported in bearings 41 and provided with a crank wheel 42 at one end, the crank pin 43. of which is connected by the pitinan 44 to the sleeve 45 fixed to the piston. rod Z. Counter-shafts 46 and 47 are suitably mounted at each side of themain shaft 40, as by means of the brackets 48 and 49 loosely supported on the main shaft 40.

The main shaft 40 is provided with the sprockets 50 and 51 connected by chains 52 and 53 to the sprockets 54 and 55 on said The counter-shafts are procounter-shafts. vided with sliding sleeves 56 and 57 keyed to rotate therewith and having gears 58,

59, 60 and 61 mounted thereon. Cross arms 62 and 63 are connected to the sleeves 56 and 57 and slidable on the brackets 48 and 49. These cross arms are provided with handles 64 by meansof which they may be grasped and moved longitudinally on the brackets and at the same time the brackets may be' rocked upon the main shaft 40. Cam shafts 65 and 66 are mounted adjacent the counter shafts 46 and 47 and provided with pinions 67 and 68 adapted to mesh with either one of the adjacent gears, so that the shafts 65. and 66 may be driven at diiferent .spe .S according to the adjustment of the apparatus. The shafts 65 and 66 are vided with the cams 69 and- 70 adapted to prooperate the trips 71 and 72 on the valve stems 73 and 74 respectively of the valves W and X.

The trips 71 and 72 are connected to retracting springs 75 and 76 as shown in detail in 5. Assuming that valve W is open with the trip 71 in the position indicated in F ig. 5, it is obvious that the cam 69 rotating'clockwise will permit the valve -lated by the shape of the cam 69 and by the strength of the spring 75. The cam 69 and spring 75 may be so designed as to 'produce a quick closure of the admission valve W, so that the explosion, if explosive combustion-is-utilized, may occur in the combustion chamber immediatelyiafter the admission of the charge to the combustion chamber, while cam 70 should be designed to maintain the exhaust valve X open a relatively longer time and close more slowly in order to provide ample time for the products of combustion to pass out from the combustion chamber and mix with steam in the motive fluid mixer. It is to be understood that valve X is opened as the cam 70 actuates the trip 72 and cam 70 also rotates clockwise with the construction shown. A suitable igniter 75 may be connected by wires 76 and 77 to and through a battery 78 and to contacts 79 and 80, one'of which is carried by the shaft 40. The cam 81 on the shaft 40 completes the circuit, in instance, at every revolution of the main shaft 40. e

The valve (not shown) in the valve chest 36 of engine cylinder Q, may be actuated from any suitable moving part of the apparatus, in 'this instance, the valve stem 82 bemg connected to a sliding block 83 moving in the guideway 84. A pitman 85 is also connected to the sliding block 83 and to an eccentric 86 on the main shaft 40, so that the valve of engine cylinder Q, is controlled by the revolutions of the valve 40. a

In order to start the generation of the apparatus, means are provided operating independently of the operation 0 the combustion chamber and the prime mover. As shown, a nozzle 87 is connected to the pipe 8 leading from the fuel mixer R and controlled by valve 88.. A flexible connection or other suitable connection 89 connects the nozzle 87 witha nozzle 90, Figs. 1 and 2, communicating with the hollow neck 9 in the walls of the combustion chamber D. A perforated adjustable hood 91 affords an additional supply of air around the nozzle 90 and a valve 92 of any suitable character controls the passage in the neck g. By closing the valve 9, leading to the compressor and opening the valve 88 leading to the flexible connection 89 and assuming that the other valves and connections in the apparatus are suitably adjusted, it is obvious that an initial charge or charges of fuel mixture will be supplied from the fuel mixer to the combustion chamber 1), where the charge may be ignited thereby starting the generation of motive fluid. In starting the apparatus, it is assumed that fuel is supplied to the burners 29 which are lighted to heat the mixer and the heat generated by the burners thoroughly vaporizes and heats the oil supplied from the'oil reservoir S and the air supplied from the air reservoir T or inlet U. On starting, when the steam pressure gage indicates that steam is being generated at a sufiiciently rapid rate, the motive fluid is admitted to the engine cylinder Q by suitably manipulating the' valves and the compressor is started. he supply and exhaust valves W and X for the combustion chamber may be kept closed until pressure in the storage reservoir L has been built up, w

and after the generation of motive fluid is fully started, the flexible-connection 89 is disconnected, the valve 92 for the passage 9 is closed, and the burners 29 turned off.

The fuel storage reservoir L may be omitted without affecting the principles involved, but the use of the reservoir is advantageous and it should have a greater cubical capacity than the combustion chamber. By using the reservoir L a compressed charge is introduced inside the combustion chamber quicker than would otherwise be the case and at a more uniform pressure and thenumber of strokes of the piston 4 in the compressor P per unit of time need not be the same as the number of explosions in the combustion chamber in the same time, but

the compressor may be operated at any suit- 7 able speed to provlde a proper supply pressure in the reservoir lrrespective of the number of explosions in the combustion chamber.

On starting, the products of combustion first generated ma pass to atmosphere through valve y'an outlet :22, or by closing valve 38 in the pipe 35 and opening valve 39 in the pipe 37, said products of combustion may pass directly to the exhaust pipe 17 and be utilized for heating the ingredients of the fuel mixture as they pass to the mixer R. A combustible gas may be used, if desired, instead of oil, without departin from the spirit of the invention, and di erent methods of vaporizing the oil fuel may be devised. The starting of the apparatus may be efi'ected where a supply of compressed air is available by utilizing compressed air to start the operation of the engine cylinder Q, thus efi'ecting compression through the operation of the compressor P and such operation may be carried on until a suitable pressure has been built up in the reservoir L.

In the modification of the apparatus shown in Fig. 6, an electric motor is provided for 0 crating the compressor P. The shaft 101 o? the motor is provided with a pinion 102 meshing with the gears 103 and 104. Gear 103 is provided with a crank pin 105 connected by the pitman 106 to the supplies the motive-fluid .to a motive fluid reservoir H, arranged in the engine supplypiston rod Z of the compressor P. In this Instance gaseous or vaporous fuel is preferably supplied to the compressor as by means of the pipe-107, while air is'supplied to the pipe 108. Separate gas and air pipes 109 and 110 lead fromthe compressor to gas and air reservoirs 111 and 112. Check valves 113 and 114 are preferably provided in the pipes 109 and 110. i The reservoirs llland 112 are preferably jacketed and supplied with jacket water through the pipe 115 having the controlling valve cates with the water jacket of the combustion chamber D. The gas and air reservoirs communicating with the combustion chamber proper by means of the pipes 118 and 119 are provided with the check valves 120 and 121 and the valve chest-s 122 and 123 containing suitable slide valves (not shown) control the supply pipes 118and 119. The exhaust pipe G leading from the combustion chamber is provided with the valve X, as in Fig. 1, having the valve stem 124 and trip 125. The steam pipe J communicates with the mixer H, as in Fig. 1, and the mixer pipe B. Suitable valve mechanism is provided for operating the valve X and the supply valves in the chests 122 and 123, preferably actuated by the motor 100. On the shaft 126 is arranged a sliding sleeve 127 keyed thereto, provided with a sprocket 128 connected by chain 129 to sprocket 130 on shaft 131. Shaft 131 is provided with the pinion 132 adapted to mesh with pinions 133, 134 and 135. A bracket 136 connects the sleeve 127 to the'shaft 131 and a handle 137 affords means for rocking the bracket 136 about the sleeve 137. The gear shaft 138 is "provlded with a sprocket 139 connected by chain 140 with a sprocket 141 on a short shaft 142 carrying a cam 143 cooperating with the trip 125 on the valve stem 124 of valve X. The igniter 175 for the combustion chamber is arranged substantially as in Fig. 1. The valve stems 145 and 146 are connectedto suitable means for adjusting the throw of the valves and thereby varying the admission of fuel mix ture to the combustion chamber. Any suitable valve mechanism may be used for this purpose and I have illustrated diagrammatically in Fig. 7 the well-lmown Stephenson link motion by means. of which the throw of the valve may be varied by adjust ing the hand operating lever 147. This link motion willnot be further described, asit is old and well-known.

mg fluid may beflsubstituted for the engine cy inder Q, or the electric motor 100 for operating the compressor P or other suitable compressing means.

116. Pipe 117 communiproducts of combustion with Obviously a turbine supplied with work' Obviously n. invention is'not limited to the precise apparatus shown and described nor to the details of construction, for various devices may be devised for carrying altering the principles involved.

I claim and desire to obtain by Letters Patent the following: f

1. In apparatus for generating motive fluid f a closed jacketed combustion chamber having supply and. exhaust ports, means for supplying water to said jacket, means for supplying charges of gaseous'or vaporous combustible fuelmixtu e intermittently to said chamber under pressure, anigniter, and vmeans at the outlet end of chamber outside of the jacket for mixing the the steam generated in the jacket by the heat of combustion.

2. In apparatus for generating motive fluid forprime movers, the combination of a closedjacketed combustion chamber havmg. supply and exhaust ports, means for supplying water to said jacket, means for supplying charges of gaseous or vaporous combustible fuel mixture intermittently to said chamber under pressure, an igniter, and means at the outlet end of the combustion chamber outside of the jacket for mixing the products of combustion with the prime movers, the combination of the combustion steam generated in the jacket by the heat of combustion, and with a diluent. 3. In apparatus for generating motive fluid, the combination with a primemover, of a jacketed combustion chamber, means for supplying water to said jacket, means for supplying charges of gaseous or vaporous combustible fuel mixture intermittently to said chamber under pressure, means at the outlet end of the chamber outside of the. jacket for mixing the products of combustion withthe steam generated in the; jacket by the heat of combustion, and means, independent of the operation of the combustion chamber and the prime mover for supplying combustible fuel to thecombustion chamber to start the apparatus.

4. In apparatus for generating motive fluid, the combination with a prime mover, of a jacketed combustion for supplying water to said jacket, means for supplying charges of gaseous or vapor- Ous combustiblefuel mixture intermittently to said chamber under pressure, an igniter, means at the outlet end of the combustion chamber outside of thejacket for mixing the products of combustion with the steam generated in the jacket by the heat of combustion, and with a diluent, and. means independent of the operation of the combustion chamber and the prime mover forsupan igniter, combustlon chamber, means plying combustible fuel mixture to the combustion chamber to start the apparatus.

5. In apparatus for generating motive fluid, the combination with a prime mover, of a combustion chamber provided with means for generating steam by the heat of combustion, means at the outlet end of the combustion chamber independent of the steam generating means for mixing the steam with the products of combustion from the combustion chamber, and means independent of the operation of the prime mover and combustion chamber for supplying combustible fuel mixture to the combustion chamber to start the apparatus. V

6. In apparatus for generating motive fluid, the combination of a jacketed comtrolling said exhaust connections, steam con-- bustion chamber having supply and exhaust ports, means for supplying water to said jacket, fuel storage means communicating with said chamber, means for supplying gaseous or vaporous combustible fuel mixture to said storage means under pressure, automatic 'means'for controlling the admis sion of the fuel mixture to the combustion chamber, a mixer connected to the exhaust of the combustion chamber, automatic means for controlling said exhaust connections, steam connections between the jacket and mixer, and means for controlling said steam connections.

7. In apparatus for generating motive fluid, the combination of a jacketed combustion chamber, means for supplying water to said jacket, storage means communicating with said hamber, means for supplying gaseous or vaporous combustible fuel mixture to said storage means under pressure, automatic means for controlling the admission of the fuel mixture to the combustion chamber, a mixer connected to the exhaust of the combustion chamber, automatic means for connections between the jacket and mixer, means for controlling said steam connections, and means for supplying a diluent to said mixer.

8. In apparatus for generating motive fluid for prime movers, the combination of a closed jacketed combustion chamber having supply and exhaust ports, means for supplying water to said jacket, means for supplying charges of. gaseous or vaporous combustible fuel mixture intermittently to said chamber under pressure, an igniter, means at the outlet end of the combustion chamber outside of the jacket for mixing the products of combustion with the steam gen erated in the jacket by the heat of combustion, and means independent of the operation of the combustion chamber and the prime mover for supplying combustible fuel mixture to the combustion chamber to start the apparatus.

jacket, a compressor for suppl 9. In apparatus for generating motive fluid for prime movers, the combination of a closed jacketed combustion chamber having supply and exhaust ports, means for supplying water to said. jacket, means for supplying charges of gaseous or vaporous combustible fuel mixture intermittently to said chamber under pressure, an 1gniter,

means at the outlet end of the combustion chamber outside of the jacket for mixing the products of combustion with the steam generated in the jacket by the heat of combustion, and with a diluent, and means independent of the operation of the combustion chamber and-the prime mover for supplying combustible fuel mixture to the combustion chamber to start the apparatus.

10. In apparatus for generating motive fluid for prime movers, the combination of a prime mover, a jacketed combustion chamber, means for supplying water to said ing charges of gaseous or vaporous combustible fuel mixture intermittently to the combustion chamher, an igniter, means at'the outlet endof the combustion chamber outside of the jacket for mixing the products of combustion with the steam generated in the jacket by the heat of combustion, and means independent of the prime mover for operating thedcompressor y the motive fluid genel ate 11. In apparatus for generating motive fluid for prime movers, the combination of a prime mover, ber, means for supplying water to said jacket, a compressor for supplying charges of gaseous or vaporous combustlble fuel mix ture intermittently to the combustion chamber, an igniter, means at the outlet end of the combustion chamber outside of the jacket for mixing the products of combustion with the steam generated in the jacket by the heat of combustion, means independent of the prime mover for operating the compressor by the motive fluid nerated and means for heating the fuel mixture by heag derived from the motive fluid generate 12. In. apparatus for generating motive fluid for prime movers, the combination with a prime mover, of a jacketed combustion chamber having supply and exhaust'ports, means for supplying water to said jacket, fuel storage means communicating with the combustion chamber, a compressor for supplying gaseous or vaporous combustible fuel mixture to said storage means, an igniter,-

a jacketed combustion chamand means for controlling said steam connections. A Y

13. In vapparatus for generating motive fluid for prime movers, the combination with a prime mover, of a jacketed combustion chamber: having supply and exhaust ports, means for supplying water to said jacket, fuel storage means communicating with the combustion chamber, a compressor for supplying gaseous or vaporous combustible fuel mixture to said storage means, an igniter, automatic means for controlling the supply of fuel mixture to the combustion chamber, a mixer connected to the exhaust of the combustion chamber, automatic means for controlling said exhaust connections, steam connec: tions between the jacket and mixer and means for controlling said steam connections, and means for operating the compressor by the motive fluid generated.

14.'In apparatus for generating motive fluid for prime movers, the combination with a prime mover, ofa jacketed combustion chamber having supply and exhaust ports, means for supplying water to said jacket, fuel storage means communicating with the combustion chamber, a compressor for supplying gaseous or vaporous combustible fuel mixture to said storage means, an igniter, automatic mcans'for controlling the supply of fuel mixture to the combustion chamber, a mixer connected to the exhaust of the combustion chamber, automatic means for controlling said exhaust connections, steam connections between the jacket and mixer .and means for controlling said. steam connections, 'means for operating the compressor by the motive fluid generated, and means for heating the fuel mixture by heat derive from the motive fluid generated.

15. In apparatus for generating motive fluid for prime movers, the combination with a prime, mover, of a jacketed combustion chamber having supply and exhaust ports, means for supplying water to said jacket, fuel storage means communicating with the combustion chamber, a compressor for supplying gaseous or vaporous combustible fuel mixture to said storage means, an igniter, automatic means for controlling the supply of fuel mixture to the combustion chamber, a mixer connected to the exhaust of the combustion chamber, automatic means for controlling said exhaust. connections, steam connections between the jacket and mixer and means for controlling saidsteam connections, means for operating the compressor by the motive fluid generated, means for heating the fuel mixture by heat derived from the motive fluid generated, and means independent of the operation of the combustion chamber and the prime mover for supplying combustible fuel mixture to the combustion chamber to startthe apparatus.

In apparatus for generating motive flu1d for prime movers, the combination with a prune mover, of ajacketed combustion chamber having means for supplying water to said jacket, fuel storage means communicating with the con bustlon chamber, a compressor for supplying gaseous or-vaporous combustible fuel mixture to said storage means, an igniter', automatic means for controlling the supply of fuelmixture to the combustion chamber, a mixer connected to the exhaust of the combustion chamber, automatic means for controlling said exhaust connections, steam connections between the jacket. and mixer and means for controllingsaid steam connections, and means independent of the operation of the combustion chamber and the prime mover for supplying combustible fuel mixture to the combustion chamber to start the apparatus.

17. In apparatus for generating highpressure motive fluid for prime movers, the combination of a closed jacketed combustion chamber having supply and exhaust ports, means for supplying Water to said jacket, means for intermittently producing combustion of charges of a gaseousor vaporous fuel mixture in said chamber, thereby heating the chamber walls and generating steam without doing other useful work in the combustion chamber, and means at the outlet end of the combustion chamber outside of the jacket for mixing the products of combustion with the steam generated in the jacket and with a diluent.

18. In apparatus for generating motive fluid, the combination of a jacketed combustion chamber, means for supplying water to said jacket, means for intermittently producing combustion of charges of a gaseous or vaporous fuel mixture 1n said chamber, a m1xer connected to sald chamber at lts outlet end, and an 'iIIJGCtOI nozzle in said mixer connected to said jacket.

19. In apparatus for generating motive fluid, the combination of a jacketed combustion chamber, means for supplying water to said jacket, means for intermittently producing combustion of charges of a gaseous or vaporous fuel mixture in said chamber, a

mixer connected to said chamber at its outlet end, and concentric nozzles in said mixer connected respectively to the combustion chamber and to the jacket.

20. -In apparatus for generating motive fluid, the combination of a closed jacketed combustion chamber having supply and exhaustports, means for supplying water to said jacket, separate reservoirs for gaseous or vaporous fuel, and a supporter of combustion, connections between said reservoirs and the combustion chamber, means for intermittently producing combustion of charges supply and exhaust ports,

of gaseous or vaporous fuel mixture in the combustionchamber, and means at the outlet end of the combustion chamber outside of the jacket for mixing the products of com- 5 bustion with the steam generated in the jacket.

21. In apparatus for generating motive fluid for prime movers, the combination of a prime mover, a jacketed combustion cham- 10 ber having supply and exhaust ports, means for supplying water to said jacket, means for intermittently producing combustion of charges of a gaseous or vaporous fuel mixture in said chamber, means for mixing the products of combustion with the steam gen- 15 erated, and means for heating the fuel mixture by heat derived from the motive fluid generated. 7

In testimony whereof I have signed this specification in the presence of two subscrib- 20 ing witnesses.

EDWIN G. HATCH.

Witnesses:

HENRY SHELDON, HERBERT G. OGDEN. 

